Thin and loose stools

For the past four weeks my stools have varied between being loose and 'blobby' (sorry for graphics) and being long and thin. I have been to my Dr who is arranging various tests but in the meantime I am absolutely terrified.

There is no blood, but lots of bloating which has been going on for months. I would also add that I am under very extreme stress and have been for quite some time. I am a real worrier and am totally obsessed now by this situation. I have had thin stools in the past but then they alternated between thin and normal. Up until four weeks ago everything was really normal.